#USPTO: 14.05.25 - Air pumps, non-motorized, Anvils, Bellows, fireplace, Caulking gun, Files (tools), Grease guns, Guns, caulking, Guns, grease, Plane (hand tool), Pokers, fireplace, Pumps, air (non-motorized), Punches (hardware), Riveters, Soldering irons #USPTO: 15.01.04 - Air cleaner filters, automotive, Alternators, Boat motors, outboards, Carburetors, vehicle, Diesel engines, Engines, combustion, Engines, steam, Engines, turbine, Filters, air cleaner (automotive), Filters, oil (automotive), Generators, Internal combustion engines, Motors (machinery), Motors, outboard (boat), Valves, automobile engine #USPTO: 18.11.25 - Battery carrier trays for automobiles, Belts, safety, vehicle, Brakes (automobile), Car seats, baby, Clutches, vehicles, Gear shifts, vehicle, Grills (automobile), Head lights, vehicle, Hitches, (trailers), Horns (vehicular), Jacks (vehicle), Kick stands (bicycle), License plates, Lights, auto, Lights, bicycle, Mirrors, vehicle, Pedals (vehicular), Porthole, Racks, (automobile), Radiators, vehicle, Sails, Seat belts, vehicle, Stick shifts (automobile), Windshields (vehicular) #Two circles one inside the other #Circles containing inscriptions arranged in circular form #USPTO: 26.19.02 - Cylinders (geometric)